std::ranges::adjacent_view<V,N>::reserve_hint
constexpr auto reserve_hint()
requires ranges::approximately_sized_range<V>
| (1) | (since C++26) |
constexpr auto reserve_hint() const
requires ranges::approximately_sized_range<const V>
| (2) | (since C++26) |
Equivalent to
usingDT=ranges::range_difference_t<decltype((base_))>;
usingCT=ranges::common_type_t<DT,std::size_t>;
autosz=static_cast<CT>(ranges::reserve_hint(base_));
sz-=std::min<CT>(sz,N-1);
return to-unsigned-like(sz);
Return value
The approximate size of the resulting range.
Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_ranges_reserve_hint | 202502L | (C++26) |
ranges::approximately_sized_range and reserve_hint (1,2) |
Example
See also
returns the number of elements, provided only if the underlying (adapted) range satisfies sized_range (public member function) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/cpp/ranges/adjacent_view/reserve_hint
